I've got one for DD, not that we often use a trolley when we go shopping as I walk there with the pram. But I love mine, I think mine is a Trolley Mate one, which is much cheaper than the Trolley Monster brand (they have a facebook group). The padding is probably a little thinner than the trolley monster ones but it does the job, especially if you can't afford the $70 odd for a trolley monster. DD's was a gift from my mum, I'm pretty sure you can get them from Target, or a specialty baby store.